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Textile > Electret
The following information is about Electret.
Electret Defined
A non-conductive polymeric material which can maintain a long-lived electrostatic charge. Polypropylene electret filtration fabrics conveniently combine the mechanical removal of particles with an electrostatic field, which materially increases the filtration efficiency.
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Off-site Electret Links, User Submitted
The following links have been collected through user bookmark submission in the Electret category. Please note, because these resources are off-site we cannot guarantee the accuracy or quality of any information.
Mon Nov 24
- Powering microphones: The load resistor defines the impedance and can be matched to the low noise amplifier intended. This is usually 1-10kOhm. The lower limit is defined by amplifier voltage noise and the upper limit by interference pickup (and amplifier current noise). Suitable resistsnce values are typically in the range of 1-10 kohm. In many cases the microphone is powered from 1.5V-5V power source through a resistor which has reistance of few kilo-ohms.
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Mon Oct 6
- Condenser Microphones: Condenser means capacitor, an electronic component which stores energy in the form of an electrostatic field. The term condenser is actually obsolete but has stuck as the name for this type of microphone, which uses a capacitor to convert acoustical energy into electrical energy.
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